1a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten/* 2a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * Copyright (C) 2010 The Android Open Source Project 3a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * 4a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * Licensed under the Apache License, Version 2.0 (the "License"); 5a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * you may not use this file except in compliance with the License. 6a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * You may obtain a copy of the License at 7a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * 8a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * http://www.apache.org/licenses/LICENSE-2.0 9a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * 10a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * Unless required by applicable law or agreed to in writing, software 11a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * distributed under the License is distributed on an "AS IS" BASIS, 12a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * See the License for the specific language governing permissions and 14a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * limitations under the License. 15a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten */ 16a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten 1710d8b6a5f9a7c24203e3ee228ec596d03c1aa78dGlenn Kasten#include "Configuration.h" 1810d8b6a5f9a7c24203e3ee228ec596d03c1aa78dGlenn Kasten 19369f3138f19f7102bf0f98b890ab84c8df633a93Glenn Kasten/** \file locks.h Mutual exclusion and condition variables */ 20369f3138f19f7102bf0f98b890ab84c8df633a93Glenn Kasten 21fe96fa06360516c60490c7a697e1148017b4c1b2Glenn Kasten#ifdef USE_DEBUG 22bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kastenextern void object_lock_exclusive_(IObject *thiz, const char *file, int line); 23bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kastenextern void object_unlock_exclusive_(IObject *thiz, const char *file, int line); 24bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kastenextern void object_unlock_exclusive_attributes_(IObject *thiz, unsigned attr, 254597a7427b697df31d0bbf4c2040806d0c27b6e0Glenn Kasten const char *file, int line); 26bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kastenextern void object_cond_wait_(IObject *thiz, const char *file, int line); 27fe96fa06360516c60490c7a697e1148017b4c1b2Glenn Kasten#else 28bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kastenextern void object_lock_exclusive(IObject *thiz); 29bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kastenextern void object_unlock_exclusive(IObject *thiz); 30bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kastenextern void object_unlock_exclusive_attributes(IObject *thiz, unsigned attr); 31bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kastenextern void object_cond_wait(IObject *thiz); 324597a7427b697df31d0bbf4c2040806d0c27b6e0Glenn Kasten#endif 33bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kastenextern void object_cond_signal(IObject *thiz); 34bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kastenextern void object_cond_broadcast(IObject *thiz); 35a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten 36fe96fa06360516c60490c7a697e1148017b4c1b2Glenn Kasten#ifdef USE_DEBUG 37bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define object_lock_exclusive(thiz) object_lock_exclusive_((thiz), __FILE__, __LINE__) 38bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define object_unlock_exclusive(thiz) object_unlock_exclusive_((thiz), __FILE__, __LINE__) 39bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define object_unlock_exclusive_attributes(thiz, attr) \ 40bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten object_unlock_exclusive_attributes_((thiz), (attr), __FILE__, __LINE__) 41bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define object_cond_wait(thiz) object_cond_wait_((thiz), __FILE__, __LINE__) 42fe96fa06360516c60490c7a697e1148017b4c1b2Glenn Kasten#endif 43fe96fa06360516c60490c7a697e1148017b4c1b2Glenn Kasten 44a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten// Currently shared locks are implemented as exclusive, but don't count on it 45a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten 46bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define object_lock_shared(thiz) object_lock_exclusive(thiz) 47bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define object_unlock_shared(thiz) object_unlock_exclusive(thiz) 48a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten 49d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten// Currently interface locks are actually on whole object, but don't count on it. 50d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten// These operations are undefined on IObject, as it lacks an mThis. 51d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten// If you have an IObject, then use the object_ functions instead. 52a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten 53bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define interface_lock_exclusive(thiz) object_lock_exclusive(InterfaceToIObject(thiz)) 54bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define interface_unlock_exclusive(thiz) object_unlock_exclusive(InterfaceToIObject(thiz)) 55bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define interface_unlock_exclusive_attributes(thiz, attr) \ 56bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten object_unlock_exclusive_attributes(InterfaceToIObject(thiz), (attr)) 57bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define interface_lock_shared(thiz) object_lock_shared(InterfaceToIObject(thiz)) 58bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define interface_unlock_shared(thiz) object_unlock_shared(InterfaceToIObject(thiz)) 59bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define interface_cond_wait(thiz) object_cond_wait(InterfaceToIObject(thiz)) 60bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define interface_cond_signal(thiz) object_cond_signal(InterfaceToIObject(thiz)) 61bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define interface_cond_broadcast(thiz) object_cond_broadcast(InterfaceToIObject(thiz)) 62a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten 635c8bd83295b2752bb7ac34f83dfb19dcdb1be5e5Glenn Kasten// Peek and poke are an optimization for small atomic fields that don't "matter". 645c8bd83295b2752bb7ac34f83dfb19dcdb1be5e5Glenn Kasten// Don't use for struct, as struct copy might not be atomic. 655c8bd83295b2752bb7ac34f83dfb19dcdb1be5e5Glenn Kasten// On uniprocessor they can be no-ops, on SMP they could be memory barriers but locks are easier. 66a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten 67bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define object_lock_peek(thiz) object_lock_shared(thiz) 68bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define object_unlock_peek(thiz) object_unlock_shared(thiz) 69bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define interface_lock_poke(thiz) interface_lock_exclusive(thiz) 70bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define interface_unlock_poke(thiz) interface_unlock_exclusive(thiz) 71bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define interface_lock_peek(thiz) interface_lock_shared(thiz) 72bcc5c7225e3b7a1dbf2e9e830987f69167acf06fGlenn Kasten#define interface_unlock_peek(thiz) interface_unlock_shared(thiz) 73